An input/output board for stop-action controls. It provides an input for the switch and two outputs for the ON and OFF coil of each control. The inputs can be used independently from the outputs, and the outputs can be used for purposes other than driving coils. The inputs are positive or negative common and the outputs drive low or high, both are selected by a jumper. The outputs are fully protected from shorts and over-current situations, with diagnostic LED’s to indicate the current state of the board. The input and output functionality is configured by the control system.